Area of a Regular Pentagon and an Inscribed Circle
Area of a Regular Pentagon and an Inscribed Circle
Secondary 1
The diagram shows a circle, with centre \(O\), of diameter \(11\) cm inscribed in a regular pentagon of sides \(8\) cm each. Taking \(\pi =3.142\),
- find the area of the regular pentagon, and
- find the area of the shaded part, correct to \(3\) significant figures.
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Answer:(a) \(110\text{ cm}^2\) (b) \(15.0\text{ cm}^2\)
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